using System;

public class No9008
{
  static void Main(string[] args)
  {
    long n = long.Parse(Console.ReadLine());
    string s = Console.ReadLine();

    string[] strs = s.Split(" ");

    long sum = 0;
    foreach(string str in strs){
      sum = sum + long.Parse(str);
    }

    Console.WriteLine("{0}", sum);
  }
}